XMPPFramework - How can I update my own avatar image?

问题

I am developing an application in that I want to update my avatar image. I am following XEP-0153 guidelines to update my avatar image and I constructed an NSXMLElement correspond to the following code in XEP-0153 and sent that element through XMPPStream.

<iq from='juliet@capulet.com' 
    type='set'
    id='vc1'>
  <vCard xmlns='vcard-temp'>
    <PHOTO>
      <TYPE>image/jpeg</TYPE>
      <BINVAL>
        Base64-encoded-avatar-file-here!
      </BINVAL>
    </PHOTO>
  </vCard>
</iq>

The server responses the following error:

<iq xmlns="jabber:client" type="error" id="vc1" to="vvreddy50@gmail.com/83557F96">
<vCard xmlns="vcard-temp">
      <photo>
        <type>image/jpeg</type>
        <binval>Base64-encoded-avatar-file-here</binval>
      </photo>
</vCard>
<error code="500" type="wait">
      <internal-server-error xmlns="urn:ietf:params:xml:ns:xmpp-stanzas">
      </internal-server-error>
</error>
</iq>

Instead of <iq to='juliet@capulet.com' type='result' id='vc1'/>

Please can anyone post the code or the link related to update avatar image? Thanks in advance.

回答1:

- (void)updateAvatar:(UIImage *)avatar 
{
    NSData *imageData = UIImagePNGRepresentation(avatar);
    dispatch_queue_t queue = dispatch_queue_create("queue", DISPATCH_QUEUE_PRIORITY_DEFAULT);
    dispatch_async(queue, ^{
        XMPPvCardTempModule *vCardTempModule = [[XMPPHandler sharedInstance] xmppvCardTempModule];
        XMPPvCardTemp *myVcardTemp = [vCardTempModule myvCardTemp];
        [myVcardTemp setName:[NSString stringWithFormat:@"%@",name.text]];
        [myVcardTemp setPhoto:imageData];
        [vCardTempModule updateMyvCardTemp:myVcardTemp];
    });
}

回答2:

#import "XMPPvCardTemp.h"

   - (void)updateAvatar:(UIImage *)avatar{  
  NSData *imageData1 = UIImageJPEGRepresentation(avatar,0.5);
        NSXMLElement *vCardXML = [NSXMLElement elementWithName:@"vCard" xmlns:@"vcard-temp"];
        NSXMLElement *photoXML = [NSXMLElement elementWithName:@"PHOTO"];
        NSXMLElement *typeXML = [NSXMLElement elementWithName:@"TYPE"stringValue:@"image/jpeg"];
        NSXMLElement *binvalXML = [NSXMLElement elementWithName:@"BINVAL" stringValue:[imageData1 base64Encoding]];

        [photoXML addChild:typeXML];
        [photoXML addChild:binvalXML];
        [vCardXML addChild:photoXML];
        XMPPvCardTemp *myvCardTemp = [[[self appDelegate] xmppvCardTempModule]myvCardTemp];
        if (myvCardTemp) {
            [myvCardTemp setPhoto:imageData1];
            [[[self appDelegate] xmppvCardTempModule] updateMyvCardTemp
             :myvCardTemp];

        }
        else{

            XMPPvCardTemp *newvCardTemp = [XMPPvCardTemp vCardTempFromElement:vCardXML];
            [[[self appDelegate] xmppvCardTempModule] updateMyvCardTemp:newvCardTemp];
        }
     }

回答3:

From the XMPP Core RFC, <error type='wait'> means:

retry after waiting (the error is temporary)

so your code should wait a while and re-send the request.

(This is assuming that you are actually sending a base64-encoded JPEG image as the BINVAL of your vCard. The reply from the server doesn't correspond to the request you say you sent, so I'm assuming you've edited both. It would be better to include the exact request and reply in your question, but truncate the base64-encoded image to a few characters for concision.)

来源：https://stackoverflow.com/questions/13227017/xmppframework-how-can-i-update-my-own-avatar-image

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